Jack Johnson top heavyweight?

He lost to Jess Willard a overgrown cowboy who didn`t take up boxing till the age of 30. He lost to Marvin Hart one of the worst heavyweight champions ever. He defeated a champion in Jefferies who hadn`t fought in five years. His great victory for the heavyweight championship was over a 5 foot 7in fighter who weighed in at around 168 pounds. Outside of politics explain to me how anyone in their right mind can consider him one of the best.